Peter Zijlstra 7a53f40890 objtool: Fix SLS validation for kcov tail-call replacement ... Since not all compilers have a function attribute to disable KCOV instrumentation, objtool can rewrite KCOV instrumentation in noinstr functions as per commit: f56dae88a8 ("objtool: Handle __sanitize_cov*() tail calls") However, this has subtle interaction with the SLS validation from commit: 1cc1e4c8aa ("objtool: Add straight-line-speculation validation") In that when a tail-call instrucion is replaced with a RET an additional INT3 instruction is also written, but is not represented in the decoded instruction stream. This then leads to false positive missing INT3 objtool warnings in noinstr code. Instead of adding additional struct instruction objects, mark the RET instruction with retpoline_safe to suppress the warning (since we know there really is an INT3). Fixes: 1cc1e4c8aa ("objtool: Add straight-line-speculation validation") Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20220323230712.GA8939@worktop.programming.kicks-ass.net		2022-04-05 10:24:40 +02:00
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Documentation	…
arch/x86	objtool: Add IBT/ENDBR decoding	2022-03-15 10:32:46 +01:00
include/objtool	objtool: Find unused ENDBR instructions	2022-03-15 10:32:47 +01:00
.gitignore	…
Build	…
Makefile	kbuild: replace $(if A,A,B) with $(or A,B)	2022-02-15 12:25:56 +09:00
builtin-check.c	objtool: Validate IBT assumptions	2022-03-15 10:32:46 +01:00
builtin-orc.c	…
check.c	objtool: Fix SLS validation for kcov tail-call replacement	2022-04-05 10:24:40 +02:00
elf.c	objtool: Ignore extra-symbol code	2022-03-15 10:32:43 +01:00
objtool.c	objtool: Find unused ENDBR instructions	2022-03-15 10:32:47 +01:00
orc_dump.c	…
orc_gen.c	…
special.c	objtool,x86: Replace alternatives with .retpoline_sites	2021-10-28 23:25:25 +02:00
sync-check.sh	…
weak.c	…